<template>
  <div id="detail">
    <detail-nav-bar class="detail-nav" @titleClick="titleClick" ref="nav"/>
    <scroll class="content"
            ref="scroll"
            :probe-type="3"
            @scroll="contentScroll">
      <detail-swiper :top-images="topImages"/>
      <detail-base-info :goods="goods"/>
      <detail-shop-info :shop="shop"/>
      <detail-goods-info :detail-info="detailInfo" @imageLoad="imageLoad"/>
      <detail-param-info ref="params" :param-info="paramInfo"/>
      <detail-comment-info ref="comment" :comment-info="commentInfo"/>
      <goods-list ref="recommend" :goods="recommends"/>
    </scroll>
    <detail-bottom-bar @addCart="addToCart"/>

    <back-top @click.native="backClick" v-show="isShowBackTop"></back-top>
    <!--    <toast :message="message" :show="show"/>-->
  </div>
</template>

<script>
  import DetailNavBar from "./childComps/DetailNavBar";
  import DetailSwiper from "./childComps/DetailSwiper";
  import DetailBaseInfo from "./childComps/DetailBaseInfo";
  import DetailShopInfo from "./childComps/DetailShopInfo";
  import DetailGoodsInfo from "./childComps/DetailGoodsInfo";
  import DetailParamInfo from "./childComps/DetailParamInfo";
  import DetailCommentInfo from "./childComps/DetailCommentInfo";
  import DetailBottomBar from "./childComps/DetailBottomBar";


  import Scroll from "components/common/scroll/Scroll";
  import GoodsList from "components/content/goods/GoodsList";

  import {getDetail, Goods, Shop, GoodsParam, getRecommend} from "network/detail";
  import {itemListenerMixin, backTopMixin} from "common/mixin";
  import {debounce} from "common/utils";

  import {mapActions} from 'vuex'

  export default {
    name: "Detail",
    components: {
      DetailNavBar,
      DetailSwiper,
      DetailBaseInfo,
      DetailShopInfo,
      DetailGoodsInfo,
      DetailParamInfo,
      DetailCommentInfo,
      DetailBottomBar,

      Scroll,
      GoodsList
    },
    mixins: [itemListenerMixin, backTopMixin],
    data() {
      return {
        idd: null,
        topImages: [],
        goods: {},
        shop: {},
        detailImages: {},
        detailInfo: {},
        paramInfo: {},
        commentInfo: {},
        recommends: [],
        themeTopYs: [],
        getThemeTopY: null,
        currentIndex: 0,
        // message: '',
        // show: false
      }
    },
    created() {
      // 1.保存传入的iid
      this.iid = this.$route.params.iid

      // 2.根据iid请求详情数据
      getDetail(this.iid).then(res => {
        // 1.获取顶部轮播数据
        // console.log(res);
        const data = res.result
        this.topImages = data.itemInfo.topImages

        // 2.获取商品信息
        this.goods = new Goods(data.itemInfo, data.columns, data.shopInfo.services)

        // 3.创建店铺信息
        this.shop = new Shop(data.shopInfo)

        // 4.保存商品的详情信息
        this.detailInfo = data.detailInfo

        // 5.获取参数信息
        this.paramInfo = new GoodsParam(data.itemParams.info, data.itemParams.rule)

        // 6.取出评论信息
        if (data.rate.cRate !== 0) {
          this.commentInfo = data.rate.list[0]
        }

        /*// 1.第一次获取，值不对
        // 值不对的原因：this.$refs.params.$el压根没有渲染
        this.themeTopYs = []

        this.themeTopYs.push(0)
        this.themeTopYs.push(this.$refs.params.$el.offsetTop)
        this.themeTopYs.push(this.$refs.comment.$el.offsetTop)
        this.themeTopYs.push(this.$refs.recommend.$el.offsetTop)

        this.$nextTick(() => {
          // 2.第二次获取:值不对
          // 值不对的原因:图片没有计算在类
          // 根据最新的数据，对应的DOM是已经被渲染出来
          // 但是图片依然是没有加载完(目前获取到offsetTop不包含其中的图片).
          // offsetTop值不对的时候， 都是因为图片的问题
          this.themeTopYs = []

          this.themeTopYs.push(0)
          this.themeTopYs.push(this.$refs.params.$el.offsetTop)
          this.themeTopYs.push(this.$refs.comment.$el.offsetTop)
          this.themeTopYs.push(this.$refs.recommend.$el.offsetTop)

          console.log(this.themeTopYs);
        })*/
      })

      // 3.请求推荐数据
      getRecommend().then(res => {
        this.recommends = res.data.list
      })

      // 4.给getThemeTopY赋值
      this.getThemeTopY = debounce(() => {
        this.themeTopYs = []

        this.themeTopYs.push(0)
        this.themeTopYs.push(this.$refs.params.$el.offsetTop - 44)
        this.themeTopYs.push(this.$refs.comment.$el.offsetTop - 44)
        this.themeTopYs.push(this.$refs.recommend.$el.offsetTop - 44)
        this.themeTopYs.push(Number.MAX_VALUE)

        // console.log(this.themeTopYs);
      })
    },
    mounted() {

    },
    updated() {

    },
    destroyed() {
      this.$bus.$off('itemImgLoad', this.itemImgListener)
    },
    methods: {
      ...mapActions(['addCart']),
      imageLoad() {
        this.newRefresh()
        this.getThemeTopY()
      },
      titleClick(index) {
        // console.log(index);
        this.$refs.scroll.scrollTo(0, -this.themeTopYs[index], 1000)
      },
      contentScroll(position) {
        // console.log(position);
        const positionY = -position.y

        let length = this.themeTopYs.length
        for (let i = 0; i < length - 1; i++) {
          //优化版
          if (this.currentIndex !== i && (positionY > this.themeTopYs[i] && positionY < this.themeTopYs[i + 1])) {
            this.currentIndex = i;
            this.$refs.nav.currentIndex = this.currentIndex
          }
          //原版
          // if (this.currentIndex !== i && (i < length - 1 && positionY >= this.themeTopYs[i] && positionY < this.themeTopYs[i + 1]) || (i === length - 1 && positionY > this.themeTopYs[i])) {
          //   this.currentIndex = i;
          //   this.$refs.nav.currentIndex = this.currentIndex
          // }
        }

        //是否显示回到顶部
        this.listenShowBackTop(position)
      },
      addToCart() {
        // 1.获取商品信息
        const product = {}
        product.image = this.topImages[0];
        product.title = this.goods.title;
        product.desc = this.goods.desc;
        product.price = this.goods.realPrice;
        product.iid = this.iid;
        // 2.将商品加入购物车里
        this.addCart(product).then((res) => {
          console.log(this.$toast);
          // this.$toast.show(res, 2000)
        })

        // this.$store.dispatch('addCart', product).then(res => {
        //   console.log(res);
        // })
      }
    }
  }
</script>

<style scoped>
  #detail {
    position: relative;
    z-index: 9;
    background-color: #fff;
    height: 100vh;

  }

  .detail-nav {
    position: relative;
    z-index: 9;
    background-color: #fff;
  }

  .content {
    height: calc(100% - 44px - 49px);
  }
</style>